Monitor ALL new sign ups to your group

Get a weekly summary report emailed to you

Click on Report

Give it a name

Scroll further down the left hand column and pick (for example) all sign ups in the last 7 days.

Click 'Save and select data' blue button on bottom right.

Choose which fields you'd like to see in your report and what order you'd like to see them

Click 'Save and get results' button

Note : This may take some time to load!

Then set up a regular report to be run, see below...